Wrench



V AN AUSTIN TARBLE.

WRENCH.

APPLICATION FILED OCT. 29,1917- I 1 ,333,002. Patented Mar. 9, 1920.

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-. UNITE sTA s van-AUSTIN TARBLE, or MARTINSVILLE, ILLINoIs.

WRENCH.-

. Application filed October 29,

To all whomiz't may concern: Be it known that I, VAN AUSTIN TARBLE,

a citizen of the United States, residing at tioned thereabout which carries the rigid jaw at its end, and .a movable jaw slidablc over the rigid jaw carrying shell and provided with a rim projecting into a longitudinal slot formed in the shell, which rim has teeth upon its inner edge for meshing engagement upon the stem whereby the movable jaw may be moved toward or away from the rigid jaw by rotation of the stem,

and also to provide a spring latch for engagementin a notch formed in thestem of the rim structure." 5 i V The invention further aims at the provision of a tool embodying these features. and which comprises relatively few parts, sim ply and easily. adjusted and assenibled, and

atool which may beecono'mically manufac tured and which is most eflicient in its purpose. The above and various other objects and advantages of this invention-will be in part 3 described and in partunderstood from the 7 following detailed description of thepresv end thereof. The stem has a head 11 upon ent preferred embodiment, the same being illustrated .in the accompanying drawing,

wherein I V Figure 1 is a longitudinal section through a tool constructed accordingto thepresent invention.

' Fig. 2 is a transverse section through the tool taken on the plane indicated by the line. 2--2 in Fig. 1. V

Fig. 3 is a similar section taken on the plane indicated by the line 3-3 in Fig. 3 through the shank of the tool;

Fig. 4 is a detailed perspective viewof a portion of a threaded stem, showing the re leasing and connecting grooves or recesses.

Referring to this drawing, 10 designates the stem of the. tool which is preferably made in one piece and extends from end to Specification of Letters Patent.

2 the shank 14. 1

Patented Mar. 9, 1920. 1917. Serial a... 199,163. i one end whichmay be termed the outer end of'the tool, and against which fits a fixed aw 12. The jaw 12' surrounds. the stem,

has a counter-sink in its outer end receiving the inner side of the head 11 thereim'and is PATENT ()FFIOE.

provided upon its inner face'with teeth or serrations 13. adapted to grip the exterior I surface of a pipe or other cylindrical object with which the I wrench of this invention" may be engaged. The fixed jaw 12 is providedwith a preferably integral shank 141 which is non-circular. in cross' -section and" l which extends longitudinally'of the stemlO,

has a relatively deep recess'15 in one side receiving the stem 10 thereln for inclosing and protecting the latter, and fits at" its inner end in a socket 16 which also surrounds the; stem and has a corresponding :non olrcular opening therein adapted'to inter-lock with Upon the L shank is slidably disposed movable jaw 17 which has anlouter surface arranged substantlallym parallelism w th the inner face of the fixed, 12, and

which is provided internally with alongitu dina'lly extending rib 18 fitting in the open" side of the recess 15 andterminating in; proximity to thestem 10. The rib 18 is pro- Y vided .with relatively cross transversely ex tending fragmentary screw threads adapted to mesh with correspondingly formed screw threads 19'on the 'stem 'lO, the threads 19 be ing interrupted atone side offthestem and forming a longitudinal groove 20 at said side of the stem through which the threaded rib 18 is adapted to mesh. The jaw 17 may" thus be slid longitudinally upon the shank 1 1 within the range. of the .tool, and upon rotation of the. stem lO the threads 19 thereof are turned and not only brought into, intermeshing engagement with the rib 18,

but also, bind against-the riband advance the movable jaw 17 against the object to be gripped.

The socket 16 has an aperture through its inner end forming a journal for the stem :10, and the stem, 10 inwardly of the socket has exterior screw threads 21 over which is threadedahand grip 22 of wood or the like which is locked on the stem, and is reinforced by ferrules 23 also threaded on the stem and engaged at oppositeends of the- I grip 22. The inner faces of the ferrules23 are recessed and'the ends of the hand gllp havebosses thereon fitting in the recess'esof the ferrules to provide relatively large fricjtional' contact surfaces between the hand grip and'the ferrules for interlocking the parts, and also for the purposeof preventing the slipping of the hand grip 22. By turning the hand grip 22 the stem 10 may be rotated in either direction. I

' The socket 16 is provided at one side and within its outer end witha tension, spring 2 of preferably the leaf type which is'fsecuredv atone end by screw 25 to the inner wall of the socket 16 near the outer extremity of the latter. Theiree inner end. ofthe spring 24: is provided with a bearing block 26 adapted to seat in a transverse notch 27 formed in the stem 10 in longitudinal alinement with the groove therein The notch -27 is spaced inwardly from the groove 20 and :forms nopart thereof, andl'i'as'an inner relatively fiattransverse "lace against which the block engages. The tension of spring 2st, maybe variedby tension screw 28 wh ch 1 is threaded through the ad acent sldeoi the socket 16 and" bearsat its inner end against the sprin 'Qat. The tension spring wlth its block comprises a tension means for llltllCflting the adjustment of the groove 20 in reg ister Withthe rlb 18 of the movable jaw as when turning the handle relatively to the shank 14 and the socket 16 the block 26 offers the greatestresistance to the turning otthe and handlewhen theiblock lies fiat npon theinner wall of the notch 27.

The fixed jaw 12 is piovided at one side with a notched hammer head Whichpreferably has a milled or corrugated surface used for impact'against nails and other ohj ects when using the tool as aha-nimer. The movable jaw 17 maybe adjusted longitudinally toward and from the fixed jaw 12 to add or detract weight with respect thereto fer varying the desired impact off the hanifiner head 291111011 objects to be struck.

a iThgius e of the tool is apparent for aside from its use as a hammer, as above stated the jaws 12 and 17 may be ad usted against the pposite sides oi'a'lnut or pipe'by bringmg} the groove QOIof the stem into register with the rib l3 and mannally" sliding the jaw'llintoicentaet with the adjacent side ef he b e t-rib r es he ha dle [screw threads 19' into meshing engagement with the threads oftherib 18. As shown to advantage in Fig. 4 the interrupted ends I of the threads 19 are beveled or tapered to provide Wedge or pointed endsfto "the threads for facilitating the introduction of the threads 19 into the threads of the rib 18.

The threads 19fby .theirinclination to the axis of the ste1n10 wedge the movable jaw 17 into binding .engagernentwith the "object between the jaws. The wrench may now be turned as a vwhole to rotate the head orobject in the desired direction, Torelease the object from the jaws it'is only necessary to turn the handle 2:2 in a reverse direetion to register the longitudinal groeve 20' of the stern with the rib 18, such position being determined by the relaxing of-the tension of the springQt against the stein;

' It is of course understoodthat various changes and modifications 'Inay be made in the detailsoi construction of this invention without departingfrom the spirit thereof, such changes and modifi'cations' being re-' stricted only by the scope of the following claim l-cla1nr:-. In awrenclnthe combination of a shank having a fixed jaw on its outer end and a longitudinal slotin itsside, a threaded stern I revolubl y carried within said shank mate mg longitudinal slot in' ts's de interruptmg, the threads, said'slots ofsaid. shank and stem adapted to be alined'. and said stem.

provided with transverse not'oh in thesame l ongitudinal plane as said slot thereof, a

movablejaw slidable on said shank and hav v ing a threaded rib projecting through the slot thereof and adapted to 1 engage in the slot and the threads of saidst'em, a ferrule" carried by shank, a leaf springgconn'eet ed within said ferrule, abearing block carried by the free end of said leaf spring adapted to seat in said transverse iiotch in said stem, and a screw threaded through the acent side of said ferrulefor varyingthe tensioning of sai'dspring. i i

VAN we e 

